With just more than one week to go before Colorado's primary election, 14,575 Weld County voters have returned mail-in ballots so far, according to the Colorado Secretary of State's Office.

The election, historic for the state, is the first one that allows unaffiliated voters to have a say in a primary election. So far, 3,316 of the new voters have returned ballots, Weld County Clerk and Recorder Carly Koppes said, bringing them into the mix with the 4,275 Weld County Democrats and 7,140 Republicans who have submitted theirs.

To give the U.S. Postal Service enough time to bring the ballots to the county's ballot processing center at the Chase Building, Koppes said Tuesday is the last day voters can mail ballots. After that point, she said, voters can go to one of the county's 24-hour ballot drop-off boxes or in-person voting centers.

As part of the historic election, unaffiliated voters were given the option to choose which ballot they wanted to receive. Just 1,600 Weld County voters took the state up on that offer, leaving everyone else with two ballots. For those voters, casting a ballot came with a major warning: Don't turn in both ballots.